Short circuit calculations on the Norwegian railway system.

IETV have a frame agreement with Norwegian Jernbaneverket. IETV will over the next coming years upgrade a great number of substations with new protection equipment. Included in the scope of supply is also relay plans.

The electrical system is one phase, 16 ⅔ Hz. I build a model of the railway system for Oslo with surroundings, and then did short circuit calculations for one of the major substations; Asker. These results are then used when deciding settings of the overcurrent and impedance protections.